build kernelbase def on arm64ec #38

Job	Run time
llvm-mingw (msvcrt)	23m 28s
llvm-mingw (ucrt)	24m 58s
gcc (msvcrt, i686)	18m 43s
gcc (msvcrt, x86_64)	20m 32s
llvm-mingw (ucrtbase)	23m 36s
gcc (ucrt, i686)	19m 20s
gcc (ucrt, x86_64)	19m 43s
gcc-cross (msvcrt, i686)	17m 18s
gcc-cross (msvcrt, x86_64)	19m 33s
gcc-cross (ucrt, i686)	18m 1s
gcc-cross (ucrt, x86_64)	18m 16s
test-libcxx (x86_64, i686-w64-mingw32-)	1h 13m 26s
test-libcxx (x86_64)	1h 13m 48s
linux-test-cross-build-ffmpeg (aarch64)	4m 48s
linux-test-cross-build-ffmpeg (x86_64)	6m 14s
test-llvm-mingw (i686, msvcrt)	3m 33s
test-llvm-mingw (i686, ucrt)	3m 41s
test-ffmpeg (x86_64)	17m 23s
linux-test-cross-build-ffmpeg (i686)	4m 52s
test-ffmpeg (i686)	16m 32s
test-llvm-mingw (x86_64, msvcrt)	3m 39s
linux-test-cross-build-ffmpeg (armv7)	5m 38s
test-llvm-mingw (i686, ucrtbase)	3m 41s
test-llvm-mingw (x86_64, ucrt)	3m 35s
test-llvm-mingw (x86_64, ucrtbase)	3m 46s
test-gcc (ucrt, i686)	40s
test-gcc (ucrt, x86_64)	42s
test-gcc (msvcrt, x86_64)	43s
test-gcc (msvcrt, i686)	40s
	7h 30m 49s

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